| 杨合群.西北地区铝土矿成矿规律概论[J].地质与勘探,2012,48(1):1-11 |
| 西北地区铝土矿成矿规律概论 |
| On Metallogenic Regularities of Bauxite Deposits in Northwest China |
| 投稿时间：2011-06-09 修订日期：2011-09-06 |
| DOI： |
| 中文关键词: 铝土矿 时空分布 成因类型 矿床式 成矿规律 西北地区 |
| 英文关键词: bauxite deposit, temporal and spatial distribution, genetic type, deposit type , metallogetic regularity,Northwest China |
| 基金项目:国家专项(编号:12120111121034,1212011085083)资助 |
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| 中文摘要: |
| [摘 要] 西北地区铝土矿均为碳酸盐岩古风化壳沉积型,其主要矿床式有:新疆阿依里式,分布于
塔里木地块北缘西段,形成于晚石炭世;陕西天桥则式,分布于鄂尔多斯地块的东缘北段、南缘东段,形
成于晚石炭世;甘肃大台子式,分布于鄂尔多斯地块的西缘南段,形成于早二叠世;陕西关坪式,分布于
扬子地块北缘,形成于中二叠世。对比分析表明,西北已知有铝土矿分布及显示的区段,以鄂尔多斯地
块成矿条件最为有利,属于华北铝土矿层位的西延地段,应是西北大区继续扩大铝土矿找矿的最佳战略
选区。 |
| 英文摘要: |
| Abstract:All the bauxite deposits in Northwest China formed in carbonate sediments with ancient weathering crusts. Their primary deposit types are as follows. The Xinjiang Ayili type, located in the western section of the northern margin of the Tarim block, formed in the Upper Carboniferous. The
Shaanxi Tianqiaoze type, located in the northern section of the eastern margin and the eastern section of the southern margin of the Ordos block, formed
in the Upper Carboniferous. The Gansu Dataizi type, located in the southern section of the western margin of the Ordos block, formed in the Cisuralian
Permian. And the Shaanxi Guanping type, located in the northern margin of the Yangtze block, formed in the Guadalupian Permian. Comparison analysis
shows that in Northwest China, from the known distribution and display sections, the most favorable conditions for forming bauxite deposits are in the Ordos block that belongs to westward extension of the bauxite layer in Northern China. It should be the best strategic selection for prospecting of bauxite deposits in Northwest China . |
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